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Exercise

Calculating Frequentist R-squared

Let's practice calculating the R-squared. By starting with the frequentist R-squared, we can check our formulas for calculating the R-squared by hand, by checking against the value in the frequentist summary. The lm_model and lm_summary objects are already in your environment.

Instructions

100 XP
  • Print the R-squared value from the lm_summary object
  • Calculate the variance of the residuals of the lm_model
  • Calculate the variance of the predicted values of the lm_model
  • Calculate the R-squared value